Towards reduced heating duration in the transient thermal dissipation system of sap flow measurements

Knowledge of transpiration is of fundamental importance for improving irrigation management. This study measured sap flow of the 'Tommy Atkins' mango tree using Granier’s thermal dissipation probe method under regulated deficit irrigation. The work was conducted in a 10-year-old ‘Tommy Atkins’ mango orchard, irrigated by micro sprinkler, located in the Irrigated Perimeter of Ceraíma, in Guanambi, Bahia, Brazil. Sap flow measurements were carried out on three consecutive days in plants under regulated deficit irrigation, with reductions of 30 and 60% of crop evapotranspiration in three phases of fruit development; beginning of flowering to early fruit growth (Phase I), fruit expansion (Phase II) and physiological maturation of fruits (Phase III). Regulated deficit irrigation led to reduced sap flow in ‘Tommy Atkins’ mango tree.

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Comment on “Sap flow measurements by a single thermal dissipation probe: exploring the transient regime” — Ann. For. Sci. 66 (2009) by Mahjoub et al. and “Sap flow measurement by a single thermal dissipation probe in transient regime: implementation of the method and test under field conditions” — Ann. For. Sci. 1-9 (2012) by Masmoudi et al.

Annals of Forest Science ◽

10.1007/s13595-012-0212-5 ◽

2012 ◽

Vol 69 (7) ◽

pp. 769-771 ◽

Cited By ~ 1

Author(s):

Maurits W. Vandegehuchte ◽

Kathy Steppe

Keyword(s):

Sap Flow ◽

Flow Measurement ◽

Transient Regime ◽

Field Conditions ◽

Thermal Dissipation ◽

Flow Measurements ◽

Thermal Dissipation Probe ◽

Sap Flow Measurements

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Assessing water requirement of orange trees using sap flow measurements in Narkhed-Pandhurna critical zone observatory (CZO) in central India

Journal of Agrometeorology ◽

10.54386/jam.v23i1.83 ◽

2021 ◽

Vol 23 (1) ◽

pp. 14-20

Author(s):

ASHUTOSH KUMAR MISHRA ◽

PARAS R. PUJARI ◽

SHALINI DHYANI ◽

PARIKSHIT VERMA ◽

RAMESH JANIPELLA ◽

...

Keyword(s):

Water Uptake ◽

Sap Flow ◽

Short Interval ◽

Central India ◽

Water Requirement ◽

Thermal Dissipation ◽

Sap Flux ◽

Flow Measurements ◽

Sap Flow Measurements ◽

Orange Trees

We used thermal dissipation method for sap flux measurements in orange trees to assess its water requirement in Narkhed-Pandhurna region. Thermal Dissipation Probe (TDP) sensors were installed in 5-year old (young) and 15-year old (mature) orange trees to measure the diurnal sap flux variations in trees during November 21, 2019, to January 31, 2020 (71 days). The results show that the maximum daily water uptake by the 5-year old tree was 1.1 L observed on 39th day of measurement (December 29, 2019) and in the 15-year old tree it was 5.0 L, and it observed on 38th day (December 28, 2019) of measurement. The cumulative water uptake during the study period by the 5-year old tree was 49.0 L, and the 15-year old tree consumed 257.4 L of water. The results were compared with the recommended irrigational values of Indian Horticulture Board (IHB), Government of India (GoI) and Groundwater Survey and Development Agency (GSDA), Government of Maharashtra (GoMH) for orange orchards. The initial investigation shows that recommended guidelines for irrigation of orange trees are exorbitantly high and needs to be revised. The sap flow methods are more precise that can measure sap flow at a very short interval and can generate a time series of data. It can be used to revise the guidelines with the aim to conserve water and propose precision water irrigation for the study area in particular and different agro-climatic zones of the country in general.

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